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A method for investigating the orientational behaviour of fibrous particles in gaseous flow
Author(s) -
Hirst Edwin,
Kaye Paul H.,
Buckley Keith M.,
Saunders Spencer J.
Publication year - 1995
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.19950120102
Subject(s) - orientation (vector space) , particle (ecology) , computation , scattering , materials science , optics , point (geometry) , light scattering , intensity (physics) , flow (mathematics) , mechanics , physics , computer science , geometry , mathematics , algorithm , geology , oceanography
A method is described by which the angular orientation distribution of fibrous particles carried in a gaseous stream may be investigated. The method is based upon the interpretation of the spatial intensity distribution or scattering profile of laser light scattered by individual fibres. The scattering instrument used to capture the profiles is described, and the mathematical computation required to ascertain the orientation of each particle at the measurement point is detailed. Illustrative results are given for a study of airborne micromachined silicon particles of 12 μm length and 1.0 μm by 1.5 μm cross‐section. The method is currently being employed by the authors to investigate ways of improving the orientation control over nonspherical particles in systems such as aerodynamic particle sizers and particle shape classifiers, since lack of particle orientation control is known to adversely affect the measurement accuracy of both these types of instrument.